CATALOGUE OF CANADIAN PLANTS. 437 



(1978.) B. OCCidentaliS, Hooker. Western Birch. 



Eather common in British Columbia extending eastward to the Sas- 

 katchewan plains. Near springs on the west side of the Rocky Moun- 

 toins. (Douglas.') On the east side from Edmonton to the Rocky Moun- 

 tains. (Drummond.) Along the North Saskatchewan from Edmonton 

 to Victoria. In the Columbia valley from Golden City to the Selkirk 

 Summit. (Macoun.} Upper Columbia lakes and river, and east of 

 mountains on tributaries of Belly River. (Dawson.} 



(1979.) B. pumila, Linn. Low Birch. 



In bogs and by the sides of lakes and rivers in the north ; extending 

 from ^Newfoundland and Labrador south through Anticosti, Nova 

 Scotia, New Brunswick, Quebec and the greater part of Ontario, and 

 westward to the foot-hills of the Rocky Mountains. 



(1980.) B. gland ulosa, Michx. Dwarf Birch. 



B. nana, Gray, Man., 412, 1858. 



This shrub is abundant from Newfoundland and Labrador westward 

 by Hudson Bay to the barren grounds and Mackenzie Eiver, and south- 

 ward along the base of the Eocky Mountains and in sub- alpine valleys 

 to Lat. 49; rather common in the foot-hills at Morley extending west- 

 ward through the Eocky Mountains to the Columbia valley and north- 

 westward through British Columbia to Alaska. Youcon Eiver, Alaska. 

 (Rothr, Alask.} 



(1981.) B. nana, Linn. Hook. Fl. II., 156. 



Newfoundland. (McCormaclc.} Sphagnous swamps, Hudson Bay 

 and Canada. (Michaux.} Labrador. (Morrison.} On the east coast 

 of Hudson Bay. (E. Bell.} Fort Franklin on the Mackenzie Eiver. 

 (Richardson.} Kotzebue Sound. Alaska. (Chamisso.) Norton Sound, 

 Chamisso Island, and Point Barrow. (Rothr. Alask.} Common in 

 Greenland. (Hook. Arct. PL} 



(1982.) E. Ermani, Cham. 



Ounalashka. (Rothr. Alask.} The two last species may be included 

 in No. 1980, but we have no means of deciding. 



550. ALNUS, Ceertn. (ALDER.) 



(1983.) A. rubra, Bongard. Western or Red Alder. 



A. glutinosa, Pursh, Fl. I., 622, in part. 

 A large tree in the valley of the Fraser River, B.C. (Dawson.) 



